Package DNS names don't resolve on dappnode host

[TripleSpeeder]

DNS names resolve fine on systems connected to the DAppNode VPN. But on the DAppNode host itself DNS names like fullnode.dappnode do not resolve:

[michael@stingray ~]$ ping fullnode.dappnode
PING fullnode.dappnode (172.33.0.3) 56(84) bytes of data.
64 Bytes von 172.33.0.3 (172.33.0.3): icmp_seq=1 ttl=63 Zeit=0.481 ms
^C
--- fullnode.dappnode ping statistics ---
1 Pakete übertragen, 1 empfangen, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 0.481/0.481/0.481/0.000 ms
[michael@stingray ~]$ ssh -l dappnode dappnode
...
dappnode@dappnode:~$ ping fullnode.dappnode
ping: fullnode.dappnode: Name or service not known
dappnode@dappnode:~$ ping fullnode
ping: fullnode: Name or service not known
dappnode@dappnode:~$ 

/etc/resolv.conf on the dappnode host:

domain fritz.box
search fritz.box
nameserver 192.168.178.1

Core DAppNode Packages versions

• dappmanager.dnp.dappnode.eth: 0.2.34, commit: d075b2f5
• core.dnp.dappnode.eth: 0.2.38
• wifi.dnp.dappnode.eth: 0.2.3
• ipfs.dnp.dappnode.eth: 0.2.10
• bind.dnp.dappnode.eth: 0.2.5
• vpn.dnp.dappnode.eth: 0.2.6, branch: v0.2.6, commit: fb3f7316

System info

• docker version: Docker version 18.09.8-ce, build 0dd43dd87fd530113bf44c9bba9ad8b20ce4637f
• docker compose version: docker-compose version 1.25.5, build unknown
• Disk usage: 51%

┆Issue is synchronized with this Basecamp todo by Unito

[dapplion]

@eduadiez Is it possible to solve this issue? I miss this feature too sometimes

[dapplion]

@3alpha could you investigate if is there any feasible solution for this? :pray:

[3alpha]

We could expose DAppNode's DNS to the host, but I don't know whether that would introduce new issues. (I don't believe so, but needs to be tested)

However, that wouldn't resolve issue because Docker's internal network isn't by default available from anywhere and that includes host machine.